<?php
/**
 * Browser detection class
 *
 * @author      Original Author: Chris Schuld (http://chrisschuld.com/)
 * @author      Modifications for EDD: Chris Christoff
 * @version     1.9
 *
 * Usage:
 * $browser = new Browser();
 * if( $browser->getBrowser() == Browser::BROWSER_FIREFOX && $browser->getVersion() >= 2 ) {
 *      echo 'You have Firefox version 2 or greater';
 * }
 *
 * User agents sampled from: http://www.useragentstring.com/
 * Based on original work from Gary White (http://apptools.com/phptools/browser/
 *
 * CHANGELOG:
 *
 * 2012-12-26 (v1.9c by Chris Christoff):
 *  + Changed vars to publics
 *
 * 2012-12-23 (v1.9b by Chris Christoff):
 *  + Removed the browser string return and added spacing.
 *  + Also removed return HTML formatting.
 *
 * 2012-12-23 (v1.9a by Chris Christoff):
 *  + Split user string and add formatting so we can print a nicely
 *    formatted user agent string
 *
 * 2010-08-20 (v1.9):
 *  + Added MSN Explorer Browser (legacy)
 *  + Added Bing/MSN Robot (Thanks Rob MacDonald)
 *  + Added the Android Platform (PLATFORM_ANDROID)
 *  + Fixed issue with Android 1.6/2.2 (Thanks Tom Hirashima)
 *
 * 2010-04-27 (v1.8):
 *  + Added iPad Support
 *
 * 2010-03-07 (v1.7):
 *  + *MAJOR* Rebuild (preg_match and other "slow" routine removal(s))
 *  + Almost allof Gary's original code has been replaced
 *  + Large PHPUNIT testing environment created to validate new releases and additions
 *  + Added FreeBSD Platform
 *  + Added OpenBSD Platform
 *  + Added NetBSD Platform
 *  + Added SunOS Platform
 *  + Added OpenSolaris Platform
 *  + Added support of the Iceweazel Browser
 *  + Added isChromeFrame() call to check if chromeframe is in use
 *  + Moved the Opera check in front of the Firefox check due to legacy Opera User Agents
 *  + Added the __toString() method (Thanks Deano)
 *
 * 2009-11-15:
 *  + Updated the checkes for Firefox
 *  + Added the NOKIA platform
 *  + Added Checks for the NOKIA brower(s)
 *
 * 2009-11-08:
 *  + PHP 5.3 Support
 *  + Added support for BlackBerry OS and BlackBerry browser
 *  + Added support for the Opera Mini browser
 *  + Added additional documenation
 *  + Added support for isRobot() and isMobile()
 *  + Added support for Opera version 10
 *  + Added support for deprecated Netscape Navigator version 9
 *  + Added support for IceCat
 *  + Added support for Shiretoko
 *
 * 2010-04-27 (v1.8):
 *  + Added iPad Support
 *
 * 2009-08-18:
 *  + Updated to support PHP 5.3 - removed all deprecated function calls
 *  + Updated to remove all double quotes (") -- converted to single quotes (')
 *
 * 2009-04-27:
 *  + Updated the IE check to remove a typo and bug (thanks John)
 *
 * 2009-04-22:
 *  + Added detection for GoogleBot
 *  + Added detection for the W3C Validator.
 *  + Added detection for Yahoo! Slurp
 *
 * 2009-03-14:
 *  + Added detection for iPods.
 *  + Added Platform detection for iPhones
 *  + Added Platform detection for iPods
 *
 * 2009-02-16: (Rick Hale)
 *  + Added version detection for Android phones.
 *
 * 2008-12-09:
 *  + Removed unused constant
 *
 * 2008-11-07:
 *  + Added Google's Chrome to the detection list
 *  + Added isBrowser(string) to the list of functions special thanks to
 *    Daniel 'mavrick' Lang for the function concept (http://mavrick.id.au)
 *
 *
 * Gary White noted: "Since browser detection is so unreliable, I am
 * no longer maintaining this script. You are free to use and or
 * modify/update it as you want, however the author assumes no
 * responsibility for the accuracy of the detected values."
 *
 * Anyone experienced with Gary's script might be interested in these notes:
 *
 *   Added class constants
 *   Added detection and version detection for Google's Chrome
 *   Updated the version detection for Amaya
 *   Updated the version detection for Firefox
 *   Updated the version detection for Lynx
 *   Updated the version detection for WebTV
 *   Updated the version detection for NetPositive
 *   Updated the version detection for IE
 *   Updated the version detection for OmniWeb
 *   Updated the version detection for iCab
 *   Updated the version detection for Safari
 *   Updated Safari to remove mobile devices (iPhone)
 *   Added detection for iPhone
 *   Added detection for robots
 *   Added detection for mobile devices
 *   Added detection for BlackBerry
 *   Removed Netscape checks (matches heavily with firefox & mozilla)
 */


// Exit if accessed directly
if( !defined( 'ABSPATH' ) ) exit;

if( !class_exists( 'thinkup_redux_Browser' ) ) {

    /**
     * Browser detection class
     *
     * @author      Chris Schuld
     * @since       1.0
     */
    class thinkup_redux_Browser {
        public $_agent              = '';
        public $_browser_name       = '';
        public $_version            = '';
        public $_platform           = '';
        public $_os                 = '';
        public $_is_aol             = false;
        public $_is_mobile          = false;
        public $_is_robot           = false;
        public $_aol_version        = '';

        public $BROWSER_UNKNOWN     = 'unknown';
        public $VERSION_UNKNOWN     = 'unknown';

        public $BROWSER_OPERA       = 'Opera';                      // Http://www.opera.com/
        public $BROWSER_OPERA_MINI  = 'Opera Mini';                 // Http://www.opera.com/mini/
        public $BROWSER_WEBTV       = 'WebTV';                      // Http://www.webtv.net/pc/
        public $BROWSER_IE          = 'Internet Explorer';          // Http://www.microsoft.com/ie/
        public $BROWSER_POCKET_IE   = 'Pocket Internet Explorer';   // Http://en.wikipedia.org/wiki/Internet_Explorer_Mobile
        public $BROWSER_KONQUEROR   = 'Konqueror';                  // Http://www.konqueror.org/
        public $BROWSER_ICAB        = 'iCab';                       // Http://www.icab.de/
        public $BROWSER_OMNIWEB     = 'OmniWeb';                    // Http://www.omnigroup.com/applications/omniweb/
        public $BROWSER_FIREBIRD    = 'Firebird';                   // Http://www.ibphoenix.com/
        public $BROWSER_FIREFOX     = 'Firefox';                    // Http://www.mozilla.com/en-US/firefox/firefox.html
        public $BROWSER_ICEWEASEL   = 'Iceweasel';                  // Http://www.geticeweasel.org/
        public $BROWSER_SHIRETOKO   = 'Shiretoko';                  // Http://wiki.mozilla.org/Projects/shiretoko
        public $BROWSER_MOZILLA     = 'Mozilla';                    // Http://www.mozilla.com/en-US/
        public $BROWSER_AMAYA       = 'Amaya';                      // Http://www.w3.org/Amaya/
        public $BROWSER_LYNX        = 'Lynx';                       // Http://en.wikipedia.org/wiki/Lynx
        public $BROWSER_SAFARI      = 'Safari';                     // Http://apple.com
        public $BROWSER_IPHONE      = 'iPhone';                     // Http://apple.com
        public $BROWSER_IPOD        = 'iPod';                       // Http://apple.com
        public $BROWSER_IPAD        = 'iPad';                       // Http://apple.com
        public $BROWSER_CHROME      = 'Chrome';                     // Http://www.google.com/chrome
        public $BROWSER_ANDROID     = 'Android';                    // Http://www.android.com/
        public $BROWSER_GOOGLEBOT   = 'GoogleBot';                  // Http://en.wikipedia.org/wiki/Googlebot
        public $BROWSER_SLURP       = 'Yahoo! Slurp';               // Http://en.wikipedia.org/wiki/Yahoo!_Slurp
        public $BROWSER_W3CVALIDATOR= 'W3C Validator';              // Http://validator.w3.org/
        public $BROWSER_BLACKBERRY  = 'BlackBerry';                 // Http://www.blackberry.com/
        public $BROWSER_ICECAT      = 'IceCat';                     // Http://en.wikipedia.org/wiki/GNU_IceCat
        public $BROWSER_NOKIA_S60   = 'Nokia S60 OSS Browser';      // Http://en.wikipedia.org/wiki/Web_Browser_for_S60
        public $BROWSER_NOKIA       = 'Nokia Browser';              // * all other WAP-based browsers on the Nokia Platform
        public $BROWSER_MSN         = 'MSN Browser';                // Http://explorer.msn.com/
        public $BROWSER_MSNBOT      = 'MSN Bot';                    // Http://search.msn.com/msnbot.htm
                                                                    // Http://en.wikipedia.org/wiki/Msnbot  (used for Bing as well)

        public $BROWSER_NETSCAPE_NAVIGATOR  = 'Netscape Navigator'; // Http://browser.netscape.com/ (DEPRECATED)
        public $BROWSER_GALEON      = 'Galeon';                     // Http://galeon.sourceforge.net/ (DEPRECATED)
        public $BROWSER_NETPOSITIVE = 'NetPositive';                // Http://en.wikipedia.org/wiki/NetPositive (DEPRECATED)
        public $BROWSER_PHOENIX     = 'Phoenix';                    // Http://en.wikipedia.org/wiki/History_of_Mozilla_Firefox (DEPRECATED)

        public $PLATFORM_UNKNOWN    = 'unknown';
        public $PLATFORM_WINDOWS    = 'Windows';
        public $PLATFORM_WINDOWS_CE = 'Windows CE';
        public $PLATFORM_APPLE      = 'Apple';
        public $PLATFORM_LINUX      = 'Linux';
        public $PLATFORM_OS2        = 'OS/2';
        public $PLATFORM_BEOS       = 'BeOS';
        public $PLATFORM_IPHONE     = 'iPhone';
        public $PLATFORM_IPOD       = 'iPod';
        public $PLATFORM_IPAD       = 'iPad';
        public $PLATFORM_BLACKBERRY = 'BlackBerry';
        public $PLATFORM_NOKIA      = 'Nokia';
        public $PLATFORM_FREEBSD    = 'FreeBSD';
        public $PLATFORM_OPENBSD    = 'OpenBSD';
        public $PLATFORM_NETBSD     = 'NetBSD';
        public $PLATFORM_SUNOS      = 'SunOS';
        public $PLATFORM_OPENSOLARIS= 'OpenSolaris';
        public $PLATFORM_ANDROID    = 'Android';

        public $OPERATING_SYSTEM_UNKNOWN = 'unknown';

        function Browser( $useragent = '' ) {
            $this->reset();

            if( $useragent != '' ) {
                $this->setUserAgent( $useragent );
            } else {
                $this->determine();
            }
        }

        /**
         * Reset all properties
         */
        function reset() {
            $this->_agent       = isset( $_SERVER['HTTP_USER_AGENT'] ) ? $_SERVER['HTTP_USER_AGENT'] : '';
            $this->_browser_name= $this->BROWSER_UNKNOWN;
            $this->_version     = $this->VERSION_UNKNOWN;
            $this->_platform    = $this->PLATFORM_UNKNOWN;
            $this->_os          = $this->OPERATING_SYSTEM_UNKNOWN;
            $this->_is_aol      = false;
            $this->_is_mobile   = false;
            $this->_is_robot    = false;
            $this->_aol_version = $this->VERSION_UNKNOWN;
        }

        /**
         * Check to see if the specific browser is valid
         *
         * @param string $browserName
         * @return True if the browser is the specified browser
         */
        function isBrowser( $browserName ) { return( 0 == strcasecmp( $this->_browser_name, trim( $browserName ) ) ); }

        /**
         * The name of the browser.  All return types are from the class contants
         *
         * @return string Name of the browser
         */
        function getBrowser() { return $this->_browser_name; }

        /**
         * Set the name of the browser
         *
         * @param $browser The name of the Browser
         */
        function setBrowser( $browser ) { return $this->_browser_name = $browser; }

        /**
         * The name of the platform.  All return types are from the class contants
         *
         * @return string Name of the browser
         */
        function getPlatform() { return $this->_platform; }

        /**
         * Set the name of the platform
         *
         * @param $platform The name of the Platform
         */
        function setPlatform( $platform ) { return $this->_platform = $platform; }

        /**
         * The version of the browser.
         * 
         * @return string Version of the browser (will only contain alpha-numeric characters and a period)
         */
        function getVersion() { return $this->_version; }

        /**
         * Set the version of the browser
         * 
         * @param $version The version of the Browser
         */
        function setVersion( $version ) { $this->_version = preg_replace( '/[^0-9,.,a-z,A-Z-]/', '', $version ); }

        /**
         * The version of AOL.
         * 
         * @return string Version of AOL (will only contain alpha-numeric characters and a period)
         */
        function getAolVersion() { return $this->_aol_version; }

        /**
         * Set the version of AOL
         *
         * @param $version The version of AOL
         */
        function setAolVersion( $version ) { $this->_aol_version = preg_replace( '/[^0-9,.,a-z,A-Z]/', '', $version ); }

        /**
         * Is the browser from AOL?
         *
         * @return boolean True if the browser is from AOL otherwise false
         */
        function isAol() { return $this->_is_aol; }

        /**
         * Is the browser from a mobile device?
         *
         * @return boolean True if the browser is from a mobile device otherwise false
         */
        function isMobile() { return $this->_is_mobile; }

        /**
         * Is the browser from a robot (ex Slurp,GoogleBot)?
         *
         * @return boolean True if the browser is from a robot otherwise false
         */
        function isRobot() { return $this->_is_robot; }

        /**
         * Set the browser to be from AOL
         *
         * @param $isAol
         */
        function setAol( $isAol ) { $this->_is_aol = $isAol; }

        /**
         * Set the Browser to be mobile
         *
         * @param boolean $value is the browser a mobile brower or not
         */
        function setMobile( $value = true ) { $this->_is_mobile = $value; }

        /**
         * Set the Browser to be a robot
         *
         * @param boolean $value is the browser a robot or not
         */
        function setRobot( $value = true ) { $this->_is_robot = $value; }

        /**
         * Get the user agent value in use to determine the browser
         *
         * @return string The user agent from the HTTP header
         */
        function getUserAgent() { return $this->_agent; }

        /**
         * Set the user agent value (the construction will use the HTTP header value - this will overwrite it)
         *
         * @param $agent_string The value for the User Agent
         */
        function setUserAgent( $agent_string ) {
            $this->reset();
            $this->_agent = $agent_string;
            $this->determine();
        }

        /**
         * Used to determine if the browser is actually "chromeframe"
         *
         * @since 1.7
         * @return boolean True if the browser is using chromeframe
         */
        function isChromeFrame() {
            return( strpos( $this->_agent, 'chromeframe' ) !== false );
        }

        /**
         * Returns a formatted string with a summary of the details of the browser.
         *
         * @return string formatted string with a summary of the browser
         */
        function __toString() {
            $text1      = $this->getUserAgent();                // Grabs the UA string
            $UAline1    = substr( $text1, 0, 32 );              // The first line we print should only be the first 32 characters of the UA string
            $text2      = $this->getUserAgent();                // Now we grab it again and save it to a string
            $towrapUA   = str_replace( $UAline1, '', $text2 );  // The rest of the printoff (other than first line) is equivalent
                                                                // to the whole string minus the part we printed off. IE
                                                                // User Agent:      thefirst32charactersfromUAline1
                                                                //                  the rest of it is now stored in
                                                                //                  $text2 to be printed off
                                                                // But we need to add spaces before each line that is split other than line 1
            $space      = '';
            for( $i = 0; $i < 25; $i++ ) { $space .= ' '; }
        
            // Now we split the remaining string of UA ($text2) into lines that are prefixed by spaces for formatting
            $wordwrapped = chunk_split( $towrapUA, 32, "\n $space" );

            return "Platform:                 {$this->getPlatform()} \n".
                   "Browser Name:             {$this->getBrowser()}  \n" .
                   "Browser Version:          {$this->getVersion()} \n" .
                   "User Agent String:        $UAline1 \n\t\t\t  " .
                   "$wordwrapped";
        }

        /**
         * Protected routine to calculate and determine what the browser is in use (including platform)
         */
        function determine() {
            $this->checkPlatform();
            $this->checkBrowsers();
            $this->checkForAol();
        }

        /**
         * Protected routine to determine the browser type
         *
         * @return boolean True if the browser was detected otherwise false
         */
         function checkBrowsers() {
            return (
                // Well-known, well-used
                // Special Notes:
                // (1) Opera must be checked before FireFox due to the odd
                //     user agents used in some older versions of Opera
                // (2) WebTV is strapped onto Internet Explorer so we must
                //     check for WebTV before IE
                // (3) (deprecated) Galeon is based on Firefox and needs to be
                //     tested before Firefox is tested
                // (4) OmniWeb is based on Safari so OmniWeb check must occur
                //     before Safari
                // (5) Netscape 9+ is based on Firefox so Netscape checks
                //     before FireFox are necessary
                $this->checkBrowserWebTv() ||
                $this->checkBrowserInternetExplorer() ||
                $this->checkBrowserOpera() ||
                $this->checkBrowserGaleon() ||
                $this->checkBrowserNetscapeNavigator9Plus() ||
                $this->checkBrowserFirefox() ||
                $this->checkBrowserChrome() ||
                $this->checkBrowserOmniWeb() ||

                // Common mobile
                $this->checkBrowserAndroid() ||
                $this->checkBrowseriPad() ||
                $this->checkBrowseriPod() ||
                $this->checkBrowseriPhone() ||
                $this->checkBrowserBlackBerry() ||
                $this->checkBrowserNokia() ||

                // Common bots
                $this->checkBrowserGoogleBot() ||
                $this->checkBrowserMSNBot() ||
                $this->checkBrowserSlurp() ||

                // WebKit base check (post mobile and others)
                $this->checkBrowserSafari() ||

                // Everyone else
                $this->checkBrowserNetPositive() ||
                $this->checkBrowserFirebird() ||
                $this->checkBrowserKonqueror() ||
                $this->checkBrowserIcab() ||
                $this->checkBrowserPhoenix() ||
                $this->checkBrowserAmaya() ||
                $this->checkBrowserLynx() ||

                $this->checkBrowserShiretoko() ||
                $this->checkBrowserIceCat() ||
                $this->checkBrowserW3CValidator() ||
                $this->checkBrowserMozilla() /* Mozilla is such an open standard that you must check it last */
            );
        }

        /**
         * Determine if the user is using a BlackBerry (last updated 1.7)
         *
         * @return boolean True if the browser is the BlackBerry browser otherwise false
         */
        function checkBrowserBlackBerry() {
            if( stripos( $this->_agent,'blackberry' ) !== false ) {
                $aresult    = explode( "/", stristr( $this->_agent, "BlackBerry" ) );
                $aversion   = explode( ' ', $aresult[1] );
                $this->setVersion( $aversion[0] );
                $this->_browser_name = $this->BROWSER_BLACKBERRY;
                $this->setMobile( true );
                return true;
            }
            return false;
        }

        /**
         * Determine if the user is using an AOL User Agent (last updated 1.7)
         *
         * @return boolean True if the browser is from AOL otherwise false
         */
        function checkForAol() {
            $this->setAol( false );
            $this->setAolVersion( $this->VERSION_UNKNOWN );

            if( stripos( $this->_agent,'aol' ) !== false ) {
                $aversion = explode( ' ',stristr( $this->_agent, 'AOL' ) );
                $this->setAol( true );
                $this->setAolVersion( preg_replace( '/[^0-9\.a-z]/i', '', $aversion[1] ) );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is the GoogleBot or not (last updated 1.7)
         *
         * @return boolean True if the browser is the GoogletBot otherwise false
         */
        function checkBrowserGoogleBot() {
            if( stripos( $this->_agent, 'googlebot' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'googlebot' ) );
                $aversion   = explode( ' ', $aresult[1] );
                $this->setVersion( str_replace( ';', '', $aversion[0] ) );
                $this->_browser_name = $this->BROWSER_GOOGLEBOT;
                $this->setRobot( true );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is the MSNBot or not (last updated 1.9)
         *
         * @return boolean True if the browser is the MSNBot otherwise false
         */
        function checkBrowserMSNBot() {
            if( stripos( $this->_agent, "msnbot" ) !== false ) {
                $aresult    = explode( "/", stristr( $this->_agent, "msnbot" ) );
                $aversion   = explode( " ",$aresult[1] );
                $this->setVersion( str_replace( ";","",$aversion[0] ) );
                $this->_browser_name = $this->BROWSER_MSNBOT;
                $this->setRobot( true );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is the W3C Validator or not (last updated 1.7)
         *
         * @return boolean True if the browser is the W3C Validator otherwise false
         */
        function checkBrowserW3CValidator() {
            if( stripos( $this->_agent, 'W3C-checklink' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'W3C-checklink' ) );
                $aversion   = explode( ' ', $aresult[1] );
                $this->setVersion( $aversion[0] );
                $this->_browser_name = $this->BROWSER_W3CVALIDATOR;
                return true;
            } else if( stripos( $this->_agent, 'W3C_Validator' ) !== false ) {
                // Some of the Validator versions do not delineate w/ a slash - add it back in
                $ua         = str_replace( "W3C_Validator ", "W3C_Validator/", $this->_agent );
                $aresult    = explode( '/', stristr( $ua, 'W3C_Validator' ) );
                $aversion   = explode( ' ', $aresult[1] );
                $this->setVersion( $aversion[0] );
                $this->_browser_name = $this->BROWSER_W3CVALIDATOR;
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is the Yahoo! Slurp Robot or not (last updated 1.7)
         *
         * @return boolean True if the browser is the Yahoo! Slurp Robot otherwise false
         */
        function checkBrowserSlurp() {
            if( stripos( $this->_agent, 'slurp' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'Slurp' ) );
                $aversion   = explode( ' ', $aresult[1] );
                $this->setVersion( $aversion[0] );
                $this->_browser_name = $this->BROWSER_SLURP;
                $this->setRobot( true );
                $this->setMobile( false );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Internet Explorer or not (last updated 1.7)
         *
         * @return boolean True if the browser is Internet Explorer otherwise false
         */
        function checkBrowserInternetExplorer() {

            // Test for v1 - v1.5 IE
            if( stripos( $this->_agent,'microsoft internet explorer' ) !== false ) {
                $this->setBrowser( $this->BROWSER_IE );
                $this->setVersion( '1.0' );
                $aresult = stristr( $this->_agent, '/' );
                if( preg_match( '/308|425|426|474|0b1/i', $aresult ) ) {
                    $this->setVersion( '1.5' );
                }
                return true;
            // Test for versions > 1.5
            } else if( stripos( $this->_agent, 'msie' ) !== false && stripos( $this->_agent, 'opera' ) === false ) {
                // See if the browser is the odd MSN Explorer
                if( stripos( $this->_agent, 'msnb' ) !== false ) {
                    $aresult = explode( ' ', stristr( str_replace( ';', '; ', $this->_agent ), 'MSN' ) );
                    $this->setBrowser( $this->BROWSER_MSN );
                    $this->setVersion( str_replace( array( '(', ')', ';' ), '', $aresult[1] ) );
                    return true;
                }
                $aresult = explode( ' ', stristr( str_replace( ';', '; ', $this->_agent ), 'msie' ) );
                $this->setBrowser( $this->BROWSER_IE );
                $this->setVersion( str_replace( array( '(', ')', ';' ), '', $aresult[1] ) );
                return true;
            // Test for Pocket IE
            } else if( stripos( $this->_agent, 'mspie' ) !== false || stripos( $this->_agent, 'pocket' ) !== false ) {
                $aresult = explode( ' ', stristr( $this->_agent, 'mspie' ) );
                $this->setPlatform( $this->PLATFORM_WINDOWS_CE );
                $this->setBrowser( $this->BROWSER_POCKET_IE );
                $this->setMobile( true );

                if( stripos( $this->_agent, 'mspie' ) !== false ) {
                    $this->setVersion( $aresult[1] );
                } else {
                    $aversion = explode( '/', $this->_agent );
                    $this->setVersion( $aversion[1] );
                }
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Opera or not (last updated 1.7)
         *
         * @return boolean True if the browser is Opera otherwise false
         */
        function checkBrowserOpera() {
            if( stripos( $this->_agent, 'opera mini' ) !== false ) {
                $resultant = stristr( $this->_agent, 'opera mini' );
                if( preg_match( '/\//', $resultant ) ) {
                    $aresult    = explode( '/', $resultant );
                    $aversion   = explode( ' ', $aresult[1] );
                    $this->setVersion( $aversion[0] );
                } else {
                    $aversion = explode( ' ',stristr( $resultant, 'opera mini' ) );
                    $this->setVersion( $aversion[1] );
                }
                $this->_browser_name = $this->BROWSER_OPERA_MINI;
                $this->setMobile( true );
                return true;
            } else if( stripos( $this->_agent, 'opera' ) !== false ) {
                $resultant = stristr( $this->_agent, 'opera' );
                if( preg_match( '/Version\/(10.*)$/', $resultant, $matches ) ) {
                    $this->setVersion( $matches[1] );
                } else if( preg_match( '/\//', $resultant ) ) {
                    $aresult    = explode( '/', str_replace( "(", " ", $resultant ) );
                    $aversion   = explode( ' ', $aresult[1] );
                    $this->setVersion( $aversion[0] );
                } else {
                    $aversion = explode( ' ', stristr( $resultant, 'opera' ) );
                    $this->setVersion( isset( $aversion[1] ) ? $aversion[1] : "" );
                }
                $this->_browser_name = $this->BROWSER_OPERA;
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Chrome or not (last updated 1.7)
         *
         * @return boolean True if the browser is Chrome otherwise false
         */
        function checkBrowserChrome() {
            if( stripos( $this->_agent, 'Chrome' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'Chrome' ) );
                $aversion   = explode( ' ', $aresult[1] );
                $this->setVersion( $aversion[0] );
                $this->setBrowser( $this->BROWSER_CHROME );
                return true;
            }
            return false;
        }


        /**
         * Determine if the browser is WebTv or not (last updated 1.7)
         *
         * @return boolean True if the browser is WebTv otherwise false
         */
        function checkBrowserWebTv() {
            if( stripos( $this->_agent, 'webtv' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'webtv' ) );
                $aversion   = explode( ' ', $aresult[1] );
                $this->setVersion( $aversion[0] );
                $this->setBrowser( $this->BROWSER_WEBTV );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is NetPositive or not (last updated 1.7)
         *
         * @return boolean True if the browser is NetPositive otherwise false
         */
        function checkBrowserNetPositive() {
            if( stripos( $this->_agent, 'NetPositive' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'NetPositive' ) );
                $aversion   = explode( ' ', $aresult[1] );
                $this->setVersion( str_replace( array( '(', ')', ';' ), '', $aversion[0] ) );
                $this->setBrowser( $this->BROWSER_NETPOSITIVE );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Galeon or not (last updated 1.7)
         *
         * @return boolean True if the browser is Galeon otherwise false
         */
        function checkBrowserGaleon() {
            if( stripos( $this->_agent, 'galeon' ) !== false ) {
                $aresult    = explode( ' ', stristr( $this->_agent, 'galeon' ) );
                $aversion   = explode( '/', $aresult[0] );
                $this->setVersion( $aversion[1] );
                $this->setBrowser( $this->BROWSER_GALEON );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Konqueror or not (last updated 1.7)
         *
         * @return boolean True if the browser is Konqueror otherwise false
         */
        function checkBrowserKonqueror() {
            if( stripos( $this->_agent, 'Konqueror' ) !== false ) {
                $aresult    = explode( ' ', stristr( $this->_agent, 'Konqueror' ) );
                $aversion   = explode( '/', $aresult[0] );
                $this->setVersion( $aversion[1] );
                $this->setBrowser( $this->BROWSER_KONQUEROR );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is iCab or not (last updated 1.7)
         *
         * @return boolean True if the browser is iCab otherwise false
         */
        function checkBrowserIcab() {
            if( stripos( $this->_agent, 'icab' ) !== false ) {
                $aversion = explode( ' ', stristr( str_replace( '/', ' ', $this->_agent ), 'icab' ) );
                $this->setVersion( $aversion[1] );
                $this->setBrowser( $this->BROWSER_ICAB );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is OmniWeb or not (last updated 1.7)
         *
         * @return boolean True if the browser is OmniWeb otherwise false
         */
        function checkBrowserOmniWeb() {
            if( stripos( $this->_agent, 'omniweb' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'omniweb' ) );
                $aversion   = explode( ' ', isset( $aresult[1] ) ? $aresult[1] : "" );
                $this->setVersion( $aversion[0] );
                $this->setBrowser( $this->BROWSER_OMNIWEB );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Phoenix or not (last updated 1.7)
         *
         * @return boolean True if the browser is Phoenix otherwise false
         */
        function checkBrowserPhoenix() {
            if( stripos( $this->_agent, 'Phoenix' ) !== false ) {
                $aversion = explode( '/', stristr( $this->_agent, 'Phoenix' ) );
                $this->setVersion( $aversion[1] );
                $this->setBrowser( $this->BROWSER_PHOENIX );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Firebird or not (last updated 1.7)
         *
         * @return boolean True if the browser is Firebird otherwise false
         */
        function checkBrowserFirebird() {
            if( stripos( $this->_agent, 'Firebird' ) !== false ) {
                $aversion = explode( '/', stristr( $this->_agent, 'Firebird' ) );
                $this->setVersion( $aversion[1] );
                $this->setBrowser( $this->BROWSER_FIREBIRD );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Netscape Navigator 9+ or not (last updated 1.7)
         * NOTE: (http://browser.netscape.com/ - Official support ended on March 1st, 2008)
         *
         * @return boolean True if the browser is Netscape Navigator 9+ otherwise false
         */
        function checkBrowserNetscapeNavigator9Plus() {
            if( stripos( $this->_agent, 'Firefox' ) !== false && preg_match( '/Navigator\/([^ ]*)/i', $this->_agent, $matches ) ) {
                $this->setVersion( $matches[1] );
                $this->setBrowser( $this->BROWSER_NETSCAPE_NAVIGATOR );
                return true;
            } else if( stripos( $this->_agent, 'Firefox' ) === false && preg_match( '/Netscape6?\/([^ ]*)/i', $this->_agent, $matches ) ) {
                $this->setVersion( $matches[1] );
                $this->setBrowser( $this->BROWSER_NETSCAPE_NAVIGATOR );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Shiretoko or not (https://wiki.mozilla.org/Projects/shiretoko) (last updated 1.7)
         *
         * @return boolean True if the browser is Shiretoko otherwise false
         */
        function checkBrowserShiretoko() {
            if( stripos( $this->_agent, 'Mozilla' ) !== false && preg_match( '/Shiretoko\/([^ ]*)/i', $this->_agent, $matches ) ) {
                $this->setVersion( $matches[1] );
                $this->setBrowser( $this->BROWSER_SHIRETOKO );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Ice Cat or not (http://en.wikipedia.org/wiki/GNU_IceCat) (last updated 1.7)
         *
         * @return boolean True if the browser is Ice Cat otherwise false
         */
        function checkBrowserIceCat() {
            if( stripos( $this->_agent, 'Mozilla' ) !== false && preg_match( '/IceCat\/([^ ]*)/i', $this->_agent, $matches ) ) {
                $this->setVersion( $matches[1] );
                $this->setBrowser( $this->BROWSER_ICECAT );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Nokia or not (last updated 1.7)
         *
         * @return boolean True if the browser is Nokia otherwise false
         */
        function checkBrowserNokia() {
            if( preg_match( "/Nokia([^\/]+)\/([^ SP]+)/i", $this->_agent, $matches ) ) {
                $this->setVersion( $matches[2] );
                if( stripos( $this->_agent, 'Series60' ) !== false || strpos( $this->_agent,'S60' ) !== false ) {
                    $this->setBrowser( $this->BROWSER_NOKIA_S60 );
                } else {
                    $this->setBrowser( $this->BROWSER_NOKIA );
                }
                $this->setMobile( true );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Firefox or not (last updated 1.7)
         *
         * @return boolean True if the browser is Firefox otherwise false
         */
        function checkBrowserFirefox() {
            if( stripos( $this->_agent, 'safari' ) === false ) {
                if( preg_match( "/Firefox[\/ \(]([^ ;\)]+)/i", $this->_agent, $matches ) ) {
                    $this->setVersion( $matches[1] );
                    $this->setBrowser( $this->BROWSER_FIREFOX );
                    return true;
                } else if( preg_match( "/Firefox$/i", $this->_agent, $matches) ) {
                    $this->setVersion( "" );
                    $this->setBrowser( $this->BROWSER_FIREFOX );
                    return true;
                }
            }
            return false;
        }

        /**
         * Determine if the browser is Firefox or not (last updated 1.7)
         *
         * @return boolean True if the browser is Firefox otherwise false
         */
        function checkBrowserIceweasel() {
            if( stripos( $this->_agent, 'Iceweasel' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'Iceweasel' ) );
                $aversion   = explode( ' ',$aresult[1] );
                $this->setVersion( $aversion[0] );
                $this->setBrowser( $this->BROWSER_ICEWEASEL );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Mozilla or not (last updated 1.7)
         *
         * @return boolean True if the browser is Mozilla otherwise false
         */
        function checkBrowserMozilla() {
            if( stripos( $this->_agent, 'mozilla' ) !== false  && preg_match( '/rv:[0-9].[0-9][a-b]?/i', $this->_agent ) && stripos( $this->_agent, 'netscape' ) === false ) {
                $aversion = explode( ' ', stristr( $this->_agent, 'rv:' ) );
                preg_match( '/rv:[0-9].[0-9][a-b]?/i', $this->_agent, $aversion );
                $this->setVersion( str_replace('rv:', '', $aversion[0] ) );
                $this->setBrowser( $this->BROWSER_MOZILLA );
                return true;
            } else if( stripos( $this->_agent, 'mozilla' ) !== false && preg_match( '/rv:[0-9]\.[0-9]/i', $this->_agent ) && stripos( $this->_agent, 'netscape' ) === false ) {
                $aversion = explode( '', stristr( $this->_agent, 'rv:' ) );
                $this->setVersion( str_replace( 'rv:', '', $aversion[0] ) );
                $this->setBrowser( $this->BROWSER_MOZILLA );
                return true;
            } else if( stripos( $this->_agent, 'mozilla' ) !== false  && preg_match( '/mozilla\/([^ ]*)/i', $this->_agent, $matches ) && stripos( $this->_agent, 'netscape' ) === false ) {
                $this->setVersion( $matches[1] );
                $this->setBrowser( $this->BROWSER_MOZILLA );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Lynx or not (last updated 1.7)
         *
         * @return boolean True if the browser is Lynx otherwise false
         */
        function checkBrowserLynx() {
            if( stripos( $this->_agent, 'lynx' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'Lynx' ) );
                $aversion   = explode( ' ', ( isset( $aresult[1] ) ? $aresult[1] : "" ) );
                $this->setVersion( $aversion[0] );
                $this->setBrowser( $this->BROWSER_LYNX );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Amaya or not (last updated 1.7)
         *
         * @return boolean True if the browser is Amaya otherwise false
         */
        function checkBrowserAmaya() {
            if( stripos( $this->_agent, 'amaya' ) !== false ) {
                $aresult    = explode( '/', stristr( $this->_agent, 'Amaya' ) );
                $aversion   = explode( ' ', $aresult[1] );
                $this->setVersion( $aversion[0] );
                $this->setBrowser( $this->BROWSER_AMAYA );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Safari or not (last updated 1.7)
         *
         * @return boolean True if the browser is Safari otherwise false
         */
        function checkBrowserSafari() {
            if( stripos( $this->_agent, 'Safari' ) !== false && stripos( $this->_agent, 'iPhone' ) === false && stripos( $this->_agent, 'iPod' ) === false ) {
                $aresult = explode( '/', stristr( $this->_agent, 'Version' ) );
                if( isset( $aresult[1] ) ) {
                    $aversion = explode( ' ', $aresult[1] );
                    $this->setVersion( $aversion[0] );
                } else {
                    $this->setVersion( $this->VERSION_UNKNOWN );
                }
                $this->setBrowser( $this->BROWSER_SAFARI );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is iPhone or not (last updated 1.7)
         *
         * @return boolean True if the browser is iPhone otherwise false
         */
        function checkBrowseriPhone() {
            if( stripos( $this->_agent, 'iPhone' ) !== false ) {
                $aresult = explode( '/', stristr( $this->_agent, 'Version' ) );
                if( isset( $aresult[1] ) ) {
                    $aversion = explode( ' ', $aresult[1] );
                    $this->setVersion( $aversion[0] );
                } else {
                    $this->setVersion( $this->VERSION_UNKNOWN );
                }
                $this->setMobile( true );
                $this->setBrowser( $this->BROWSER_IPHONE );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is iPod or not (last updated 1.7)
         *
         * @return boolean True if the browser is iPod otherwise false
         */
        function checkBrowseriPad() {
            if( stripos( $this->_agent, 'iPad' ) !== false ) {
                $aresult = explode( '/', stristr( $this->_agent, 'Version' ) );
                if( isset( $aresult[1] ) ) {
                    $aversion = explode( ' ', $aresult[1] );
                    $this->setVersion( $aversion[0] );
                } else {
                    $this->setVersion( $this->VERSION_UNKNOWN );
                }
                $this->setMobile( true );
                $this->setBrowser( $this->BROWSER_IPAD );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is iPod or not (last updated 1.7)
         *
         * @return boolean True if the browser is iPod otherwise false
         */
        function checkBrowseriPod() {
            if( stripos( $this->_agent, 'iPod' ) !== false ) {
                $aresult = explode( '/', stristr( $this->_agent, 'Version' ) );
                if( isset( $aresult[1] ) ) {
                    $aversion = explode( ' ', $aresult[1] );
                    $this->setVersion( $aversion[0] );
                } else {
                    $this->setVersion( $this->VERSION_UNKNOWN );
                }
                $this->setMobile( true );
                $this->setBrowser( $this->BROWSER_IPOD );
                return true;
            }
            return false;
        }

        /**
         * Determine if the browser is Android or not (last updated 1.7)
         *
         * @return boolean True if the browser is Android otherwise false
         */
        function checkBrowserAndroid() {
            if( stripos( $this->_agent, 'Android' ) !== false ) {
                $aresult = explode( ' ', stristr( $this->_agent, 'Android' ) );
                if( isset( $aresult[1] ) ) {
                    $aversion = explode( ' ', $aresult[1] );
                    $this->setVersion( $aversion[0] );
                } else {
                    $this->setVersion( $this->VERSION_UNKNOWN );
                }
                $this->setMobile( true );
                $this->setBrowser( $this->BROWSER_ANDROID );
                return true;
            }
            return false;
        }

        /**
         * Determine the user's platform (last updated 1.7)
         */
        function checkPlatform() {
            if( stripos( $this->_agent, 'windows' ) !== false ) {
                $this->_platform = $this->PLATFORM_WINDOWS;
            } elseif( stripos( $this->_agent, 'iPad' ) !== false ) {
                $this->_platform = $this->PLATFORM_IPAD;
            } elseif( stripos( $this->_agent, 'iPod' ) !== false ) {
                $this->_platform = $this->PLATFORM_IPOD;
            } elseif( stripos( $this->_agent, 'iPhone' ) !== false ) {
                $this->_platform = $this->PLATFORM_IPHONE;
            } elseif( stripos( $this->_agent, 'mac' ) !== false ) {
                $this->_platform = $this->PLATFORM_APPLE;
            } elseif( stripos( $this->_agent, 'android' ) !== false ) {
                $this->_platform = $this->PLATFORM_ANDROID;
            } elseif( stripos( $this->_agent, 'linux' ) !== false ) {
                $this->_platform = $this->PLATFORM_LINUX;
            } elseif( stripos( $this->_agent, 'Nokia' ) !== false ) {
                $this->_platform = $this->PLATFORM_NOKIA;
            } elseif( stripos( $this->_agent, 'BlackBerry' ) !== false ) {
                $this->_platform = $this->PLATFORM_BLACKBERRY;
            } elseif( stripos( $this->_agent,'FreeBSD' ) !== false ) {
                $this->_platform = $this->PLATFORM_FREEBSD;
            } elseif( stripos( $this->_agent,'OpenBSD' ) !== false ) {
                $this->_platform = $this->PLATFORM_OPENBSD;
            } elseif( stripos( $this->_agent,'NetBSD' ) !== false ) {
                $this->_platform = $this->PLATFORM_NETBSD;
            } elseif( stripos( $this->_agent, 'OpenSolaris' ) !== false ) {
                $this->_platform = $this->PLATFORM_OPENSOLARIS;
            } elseif( stripos( $this->_agent, 'SunOS' ) !== false ) {
                $this->_platform = $this->PLATFORM_SUNOS;
            } elseif( stripos( $this->_agent, 'OS\/2' ) !== false ) {
                $this->_platform = $this->PLATFORM_OS2;
            } elseif( stripos( $this->_agent, 'BeOS' ) !== false ) {
                $this->_platform = $this->PLATFORM_BEOS;
            } elseif( stripos( $this->_agent, 'win' ) !== false ) {
                $this->_platform = $this->PLATFORM_WINDOWS;
            }
        }
    }
}
?>
